2-4
IM 765501-01E
Flow Chart of a Source Measure Cycle
The time indicated in the chart is a typical time needed for its processing. The averaging
time varies depending on the average count, and the computation time varies depending
on the complexity of the equation.
Trigger
Source delay
+S. Delay
Range
mismatched when auto
source range is
selected?
Range
mismatched when auto
measurement range
is selected?
Change source range
+3 ms
Is measurement ON?
Measurement delay
+M. Delay
A/D operation
+IntgTime*
A/D operation
+IntgTime*
Change to optimal range
+2 ms
Auto zero?
Zero compensation
Block average
operation?
Average count
finished?
Resistance
measurement?
Calculate resistance
+100
µ
s
Moving average (+moving
average count
×
1.5
µ
s)
Computation
+150
µ
s
Computation
+150
µ
s
NULL computation
+20
µ
s
Comparison
+20
µ
s
End source
measure cycle
Update source level
+10
µ
s
No
Yes
No
No
No
No
No
Yes
Yes
No
Yes
Yes
Yes
Yes
* Integration time + 200
µ
s when the integration time is 250
µ
s, 1 ms, or 4 ms.
Integration time + 520
µ
s when the integration time is 20 ms, 100 ms, or 200 ms.
2.2 Source Measure Cycle